Ongoing Crestal Bone Loss around ImplantsSubjected to Computer-Guided FlaplessSurgery and Immediate Loading Usingthe All-on-4® Concept

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Ongoing Crestal Bone Loss around ImplantsSubjected to Computer-Guided FlaplessSurgery and Immediate Loading Usingthe All-on-4® Concept

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Publication Article, peer reviewed scientific
Title Ongoing Crestal Bone Loss around ImplantsSubjected to Computer-Guided FlaplessSurgery and Immediate Loading Usingthe All-on-4® Concept
Author(s) Browaeys, Hilde ; Dierens, Melissa ; Ruyffelaert, Christian ; Matthijs, Carine ; De Bruyn, Hugo ; Vandeweghe, Stefan
Date 2015
English abstract
Background: The All-on-4® concept is widely applied for full-arch rehabilitations, using two tilted and two axially loadedimplants in order to overcome anatomical constraints.Purpose: The aim of this study was to assess the survival and individual success of implants immediately loaded with anAll-on-4 full-arch screw-retained prosthetic bridge i n fully edentulous mandibles or maxillae over up to 3 years.Materials and Methods: In total, 20 patients with atrophic jaws (9 maxillae, 11 mandibles) were treated with computer-guided flapless surgery and immediately provided with a provisional bridge. The final prosthesis was delivered after6 months. In total, 80 TiUnite™ Brånemark implants were placed. Radiographs were taken after surgery and 1 and 3 yearslater.Results: A 3-year survival rate of 100% was seen for all implants, both in lower and in upper jaw. None of the temporaryor definite prostheses were lost over the follow-up period of 3 years. After 1 year, the mean bone loss was 1.13 mm (SD 0.94;range −0.1 to 3.8), and after 3 years, it was 1.61 mm (SD 1.40; range 0 to 5). The mean bone loss between the 1-year and3-year follow-ups was 0.48 mm (SD 0.66; range −1.2 to 3.6). This difference was statistically significant (p < .001), indicativeof ongoing bone loss. Twenty-six percent of the implants had bone loss above 1.5 mm after 1 year, but after 3 years, 30%of the implants had already lost more than 1.9 mm.Conclusion: The implant and prosthetic survival was 100%, and patients benefited from the All-on-4 treatment. However,unacceptable ongoing bone loss was seen in 49.2% of the patients; this may be a warning sign for future problems and needsclinical attention. Overloading and surgery-related aspects need to be investigated as potential explanations.
DOI http://dx.doi.org/10.1111/cid.12197 (link to publisher's fulltext)
Publisher Wiley
Host/Issue Clinical Implant Dentistry and Related Research;5
Volume 17
ISSN 1523-0899
Pages 831-843
Language eng (iso)
Subject(s) All-on-4
bone level
bone remodeling
immediate loading
one-stage
surgery
prosthetic complications
success
Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/19979 (link to this page)

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